sanborn



1&95596.

A. P. SANBORN 6L R. C. WILSON.

CLOSED CIRCUIT MAGNET. APPLICAHON FILED JULY 22,1915.

2 SHEETS-SHEET l.

A. P. SANBORN 6I R. C. WILSON.

CLOSED CIRCUIT MAGNET. APPLICATION FILED IuLY 22.191

ARTHUR P. SANBOR AND ROY C. WILSON, OF OSSINING, N EW YQRK.

CLOSED-CIRCUIT MAGNET.

To all Iwhom t may concern:

Be it known that we, ARTHUR P. SANBORN and 'Roy C. WILSON, citizens of the United States, residing at Ossining, in the county of lVestchester and State of New York, have invented certain new and useful 1mprovements in Closed-Circuit Magnets; and we do declarel the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperta'ins to make and use the same.

This inventionv relates generically to means for arresting the travel of a locomotive or train along the right of Way.

One object of the invention is to provide an electric magnet adapted to be controlled by the operating circuit of a standard semaphore and movable thereby to operative and inoperative positions. dependent upon the dispositions of the semaphore arm.

Another and further object is to provide an electrically controlled means, motor or solenoid for actuating said electro-magnet, said means or solenoid having its energizing circuit normally closed, whereby opening of said circuit will permit the electromagnet to revolve to an operative position.

Another and further object residesin providing a means for augmenting the strength of the electro-magnet when the latter is in an operative positioIi.

With these and other objects in view our invention consists of certain novel details of construction, combination and arrangement of parts to be hereinafter' more particularly set forth and claimed.

In the accompanying drawings, in which corresponding parts are indicated by similar reference characters: Figure 1 is a diagrammatic view illustrating the disposition of our improved track magnet and showing the circuits established when the semaphore arm is in aI position indicating safety; Fig. 2 is a longitudinal section through the casing of our improved track magnet having in connection therewith a diagrammatic illustra'- tion of a circuit established when the semaphore arm is in a position indicating dan-l ger; Fig. 3 isa transverse vertical section taken on the line 3 3 of Fig. 2, With'the magnet in operative position; Fig. 4 1s av similar view taken' on the line of Fig. 2; Fig. l5 is a similar vlew with the magnet in inoperative. position, and taken on the .line 3--3 of Fig. 2.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application led July 22, 1915. Serial N o. 41,382.

ycasing adapted to be disposed adjacent the track at the entrance of each block, said casing having therein a permanent magnet, the latter having two positions operative and inoperative. A motor within the casing normally maintains the electro-magnet in an inoperative position.l When, however, the circuitof said motor is broken the permanent magnet will be revolved by gravity to an operative position and when in this position the energizing coil which is carried by the permanent magnet is placed in circuit with a source of electrical supply so that the strength of the permanent magnet when in operative position is thereby materially increased.

Referring more particularly to the drawings 1 represents a locomotive, 2 the track.

trols the movement of arm 4L in a manner readily understood by those versed in the art. Also mounted .withinthe base of semaphore 3 is an electro-magnet 6 which coperates with switch '7, said switch having two terminals 8 and 9 and beingadapted to close one break in the circuit of battery 10 in a manner hereinafter to be pointed out.

Situated adjacent the tracks 2 at the entrance of each block is a metal casing 11 rectangular in configuration and preferably formed of aluminum. However, in this connection it is to be understood that we do not wish ourselves to be limited in any way to the use of this particular metal.v A cover 12 forms a closure for the open top of the casing, said cover' being, when in closed position, secured by any suitable fastening element. l

Suitably mounted lin spaced and alining relation within thecasing l1 are the two standards 14. Sleeves l5 secured to the upper end of the standards 14 contain externally threaded pivot pins 16,Which are held in fixed position by the lock nuts 17. The inner ends of the -pivot pins 16 are ronged for a purpose hereinafter to be set Orth.

'A permanent magnet in the form of a U- shaped bar 18, the latter including an intermediate portion 19 and legs 20 the free extremities of which are T-shaped as at 21, is pivotally supported intermediate the standards 14. Trunni'ons 22 formed on the legs 20 are provided with indentations to receive the pronged ends pivotally support the magnet as will be readily. understood without furtherfdescri-ption. U f

A quadrant gear 23 is ii'Xedly secured to 'one of thetrunnions 22 and meshes with gear v24 keyed to the shaft. of-inotor 25. his motor .25 is supported in proper position bybra'cket 26 fastened to standard 14;` Metallic' disks 26 and 26f .fixed tothe re'- maining trunnion 22 are provided 'fon their periphery with short strips of insulating extremities -in engagement material the purpose of inafter set forth.

Two resilient within the casing which will behereiin'gers' 27 are so). mounted with the periph- .I eries of the disks 26 and 26., the lower eX- tremities of said fingers being secured in insulated rel-ation to terminal block 28 within the casing(Y This terminal block A282has the two binding. posts 29 and 29 thereon which' latter are connected to the resilient fingers 27. Counterweights 30 projecting in spaced relation from the intermediate portion 19 of thepermanent magnet serve to bring .the legs 20 to a vertical or operative position. When the legs 20 are in a horizontal posi tion the` T-shaped enlargements thereon.'

will'be disposed immediately to the rear of' one side of the casing 11, (whichis the'in-Q operativepositionof the same,) and as the movable member on the locomotive is arone brush ofinotor 5 inthe base-of sema' i vphore 3, thelother. brush thereof being connected by a conductor to vone terminal ofthe electric magnet 6. The other terminalof this magnet is. connected by aconductor 33 to one terminal of motor ,25.` The other terminal' ofsaid motor is .connected 'by a conductor` 34 to the negative lead 35 of the distant-.circuits- From the' circuit traced it will Vbe obvious that motors 5 `and 25 are .energized simultaneously 4"so that as long as` the 'semaphore arm 4 is maintained in posif ,tions indicative of safety or caution, motor 25 willv be. energied so Vas `arms 20 of to retain the 4 thelmagnet inV a' horizontal position.

.agTo increase the strength of the' magnet is in a 'vertical vposition coil when the. latter of the pivot lpins 16 to.v

" battery wto one terminal 9' of switch 7. `The other llas to have their upper` the extremities of` 31 thereon placed in circuit with battery 10 as follows: The positive -pole of said 10 is connected by a conductor 36 terminal'S thereof is-connectedby 'a conductor 37 .to one of the binding posts 29 on the terminal .block 28, the remaining bind- '.ingpost l29 being connectedgby a conductor 38to conductor 34 which conductor'is connected by a conductor -39 to the negative pole of battery l10. As it would not be desirable to have.l the current continuously pass through the coil 31 on the permanent magnet whenv the same 1s in a horizontal positionLthe insulating material on the 'two disks 26 and 26` is so arranged as tobe in engagement with resilient fingers 27 when the magnet isin an inoperative position so as to break the circuit ofgbatte'ry 10.

`. In view of the above it will be obvious that the passage of'curr'ent through motor.

5to energize the latter and maintain the semaphore arm 4 .caution 0r safety, 25 and .retain the permanent magnet-iin inoperative position, while on the other hand when the circuit of the motor 5 isfbroken to allow the's'emaphore'arm 4 to drop to a position indicating danger, that of motor,

25 will also be broken so as to allow the'perin position indicative Vof l will also energize motor manentmagnet to revolve to an operativel osition with the enlargement 21 disposed immediately below the hinged cover of cas' ing 11. Opening the .circuits of motors 5 vand `25l respectively also denergizes the electro-magnet 6 and permits switch 7 to Y close one break in the circuit of battery 10, the other* break in said circuit being closed the resilient fingers 27 which, when thev'permanent magnet is in a vertical position,

engage `the periphery ofthe metallic disks 26and `26 so thatcurrent may thus pass through the coil 31 'on the permanent mag-A net to further magnetize the latter.

When the permanent magnet is in an operative position the magnetic lines of force may pass to the exterior of the casing through .the cover thereof and thus pull `downwardly the movable army carried by the locomotive, which as the latter passes casing 11, projects above the same. This arm when actuated may coperate with suitable circuit closing members to close certain circuits von the locomotive and in this .manner arrest the travel'of the latter and warnthe engineer`- that he is passing a sema- `phore whosearm indicatesl danger.- Inasmuchv as'it is immaterial to ythis invention .whatresult movement `of the arm produces,

the lsame is only shown for'the purpose of disclosing the utility of theinvention under consideration.

Therefore 'the circuits fory iis controlling! the mechanism which might..

l,operate the' air valve of thetrainj and control the movement of lthe latter as well as (the switches which would be affected by described, the magnet 19 is a permanent magnet, the material from Which it ismade being hard steel, Which, asis Well known,

-reta-ins itsv magnetism. As the. batteries which supply the source of current for the circuit may at times deteriorate and as the Wires in the coil or in the circuit may become broken, this construction provides a.

V device which will be operative at all times.

cov

By the provision of a magnet which is normally maintained in an inoperative position by a motor Whose circuit is normally closed should the circuit of said motor be opened the electro-magnet will drop to an operative position and consequently should the semaphore system be disarranged for any reason the electro-magnets controlled by such semaphore would not remain inoperative, but would immediately drop to operative position so as to arrest the travel of the train or locomotive as the case may be.

Although by the foregoing We have set forth certain elements asbest adapted to perform the functions alloted to them, it is to be understood that certain minor changes as to form, substance, etc., may be resorted to Within the scope of the appended claims.

Having now described our invention, what We claim isz'- l. In an electro-magnet tripping mechanism of the character described, the combination with a swivelly mounted permanent magnet disposed adjacent a track, of means for operating said magnet to horizontal and vertical positions, and additional means for increasing the magnetic strength of said permanent magnet When the latter is in a vertical position; i

2. In an electro-magnet tripping mechanism of the character described, the combination With a permanent magnet disposed contiguous to a. track, and a source of electrical supply; of means for actuating said magnet to operative and inoperative positions, an energizing coil carried by said magnet, and additional means for placing said coil incircuit with said source ofsupply when the magnet is in its operative position.

3. In an electro-magnetic tripping mechanism of the character described, the combination with a pair of standards arranged in spaced relation adjacent a track, and a permanent magnet swivelly supported by said standards; of means for actuating said magnet to horizontal and vertical positions, a

source of electrical supply, an energizing coil carried by said magnet to increase the strength thereof, a pair of metallic disks carried by said magnet and connected to the extremities of the coil thereon, and a pair of contact members adapted to coperate with said metallic disks and place said coil in circuit With said source of supply.

fl. ln an electro-magnetic tripping mechanism of' the character described, the combination with a pair of standards disposed in spaced rela-tion adjacent'a track, and a U- shaped magnet sWivelly supported by said standards and having operative andl inoperative positions; of a motor,'a gear carried by said motor, a quadrant gear carried by said magnet and meshing with said motor gear, means for energizing and denergizing said motor, a coil encircling the intermediate portion of said U-shaped magnet, a source of supply', and means for placing said coil in circuit with said source of supply when the magnet is in an operative position..

5. The combination With a casing; of a U'- shaped magnet swivelly mounted Within theY casing and having horizontal and vertical positions, means for bringing said magnet to horizontal and vertical positions, a coil disposed upon the intermediate portion of said U-shaped magnet, a source of electrical energy, .and means for -placing said coil in circuit With said source of electrical energy when the magnet is in a vertical position.

6. The combination With a casing, of a pair of standards disposed in spaced relation within said casing, a U-shaped permanent magnet swivelly supported by said .standards, said magnet having'horizontal and vertical positions, enlargements' on the eXtremities of said U-shaped magnet adapted to be disposed to the rear of one side of said casing when said magnet is in a horizontal position, a motor cooperating With said magnet to actuate the latter to a horizontal position, an energizing circuit for said motor, a coil disposed upon the intermediate portion of said U-shapcd magnet, a source of supply, means to place said coil in circuit with said source of supplywhen said magnetis in a vertical position, and additional means for disconnecting said coil from said source of supply when said magnet is in a horizontal position substantially as and for the purpose set forth.

In testimony whereof We have hereunto set our hands in presence of twosubscribing Witnesses.

ARTHUR P. SANBORN.

ROY C. WILSON.

lVitnesses H. K. HoRToN, P. HARDIMAN. 

